The system must initialize some arrays before initializing the SPD in order to execute FspMemoryInit. 

I do not know what these arrays do,  and how do I get these values when porting new motherboard.

These codes exist on the SKYLAKE platform which using FSP2.0.  Call path : 

fsp_memory_init->do_fsp_memory_init->platform_fsp_memory_init_params_cb->mainboard_memory_init_params

array list :

    FSPM_UPD->FspmConfig->DqByteMapCh0

    FSPM_UPD->FspmConfig->DqByteMapCh1

    FSPM_UPD->FspmConfig->DqsMapCpu2DramCh0

    FSPM_UPD->FspmConfig->DqsMapCpu2DramCh1

If you can help me extremely grateful ! ! !